document.write( "Question 526505: Please help me solve this equation: Bill is nine years older than Jack. In Six years Bill will be twice as old as Jack. Find their present ages. \n" ); document.write( "
Algebra.Com's Answer #348547 by Earlsdon(6294)\"\" \"About 
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Let B = Bill's present age and J = Jack's present age, then...
\n" ); document.write( "1) B = J+9 \"Bill is nine years older than Jack.\"
\n" ); document.write( "2) B+6 = 2(J+6) \"In six years Bill will be twice as old as Jack.\"
\n" ); document.write( "Substitute B = J+9 from equation 1) for the B in equation 2) to get:
\n" ); document.write( "(J+9)+6 = 2(J+6) Simplify.
\n" ); document.write( "J+15 = 2J+12 Subtract J from both sides.
\n" ); document.write( "15 = J+12 Subtract 12 from both sides.
\n" ); document.write( "3 = J
\n" ); document.write( "Jack's present age is 3 years and Bill's present age is 3+9 = 12 years.
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